Well, don't know where exactly on the Gulf Coast your from but I go through many sources to get products. Most of my product list comes from the internet, because I can find the stuff that they don't sell OTC. But living on the coast has its advantages. I can pick up all my 303 Aerospace products,Flitz, Plexus, Megs,3M all from boating stores(West Marine). There's some good finds at many auto parts stores too . Here's a list off the top of my head.
Car Quest-Duragloss,Aquapel, clay magic(red and blue)
Advance- , Stoners IG
AutoZone-clay magic, Surf City
Pep Boys-Surf City, Brinkman
Oreilly-in the car paint section they have the Megs Mirror Glaze products and even sell the #21 at $3 cheaper than the NXT they have up front. They also have #1-12. Tasco Auto Color- they have many locations in Texas and sell 3M and Megs pro lineup. I buy all my Megs products here because if they don't have it they can get it, saves on shipping. This is where I get the M105,M205 from as well as APC's, Megs sprayers and Clay Magic.
Lowes-Folex, Halogens and the Grout sponges of course.
Hope this helps a little, I know I could think of more but I'm out of the house on my Blackberry.